Lawyers representing Occupy protesters in Tucson said they filed a civil rights suit in federal court, seeking a temporary ban on arrests of demonstrators.

Meanwhile police and local officials across the United States and Canada grappled with potential violence as they sought to evict Occupy protesters in their cities.

While Occupy protesters in Tucson solicited materials online Monday to help winterize their camp at Viente De Agosto Park, volunteer attorneys calling themselves Occupy Tucson Legal Working Group said a civil rights suit was filed in federal court to ask for a “temporary restraining order to stop arrests at Veinte De Agosto Park,” CNN reported.